I'm not sure what happened but i was checking that my RPi was up to date after not having used it for a couple of weeks (i was away) and now i have no audio. It looks like i've got a problem with the udrc audio module not loading but i'm not really sure how to troubleshoot it again. I tried what was suggested to me (and worked) in the past:
pi@n3ap-p:~/n7nix/bin $ sudo ./chk_bootcfg.sh
Verify IF dtoverlay= is set properly
dtoverlay currently set to: dtoverlay=draws
dtoverlay for DRAWS OK
Verify IF dtparam=audio is set properly
Last line in /boot/config.txt OK
pi@n3ap-p:~/n7nix/bin $ ./chk_conflict.sh
Check udrc driver conflict for Kernel release: 4.14.98-v7+
=== Loaded module check
=== Sound card check
udrc driver not loaded.
pi@n3ap-p:~/n7nix/bin $ aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: ALSA [bcm2835 ALSA], device 0: bcm2835 ALSA [bcm2835 ALSA]
Subdevices: 7/7
Subdevice #0: subdevice #0
Subdevice #1: subdevice #1
Subdevice #2: subdevice #2
Subdevice #3: subdevice #3
Subdevice #4: subdevice #4
Subdevice #5: subdevice #5
Subdevice #6: subdevice #6
card 0: ALSA [bcm2835 ALSA], device 1: bcm2835 ALSA [bcm2835 IEC958/HDMI]
Subdevices: 1/1
Subdevice #0: subdevice #0
pi@n3ap-p:~/n7nix/bin $ ./showudrc.sh
==== Sound Card ====
No udrc sound card found.
==== Pi Ver ====
Pi 3 Model B+ Mfg by Sony UK
Has WiFi
==== udrc Ver ====
Found a DRAWS
HAT ID EEPROM
Name: hat
Product: Digital Radio Amateur Work Station
Product ID: 0x0004
Product ver: 0x0405
UUID: b1f4e1df-11e0-4d2b-b213-c87b4dacb830
Vendor: NW Digital Radio
==== sys Ver ====
----- image version
2019 04 02 13:59:08 PDT: SD image version: beta11
----- /proc/version
Linux version 4.14.98-v7+ (dom@dom-XPS-13-9370) (gcc version 4.9.3 (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1200 SMP Tue Feb 12 20:27:48 GMT 2019
----- /etc/*version: 9.9
----- /etc/*release
PRETTY_NAME="Raspbian GNU/Linux 9 (stretch)"
NAME="Raspbian GNU/Linux"
VERSION_ID="9"
VERSION="9 (stretch)"
ID=raspbian
ID_LIKE=debian
HOME_URL="http://www.raspbian.org/"
SUPPORT_URL="http://www.raspbian.org/RaspbianForums"
BUG_REPORT_URL="http://www.raspbian.org/RaspbianBugs"
----- lsb_release
No LSB modules are available.
Distributor ID: Raspbian
Description: Raspbian GNU/Linux 9.9 (stretch)
Release: 9.9
Codename: stretch
---- systemd
Static hostname: n3ap-p
Icon name: computer
Machine ID: 2f51e140e908474eaa86ae805f03a6d8
Boot ID: a289b2ab2cea40f2b188f083b400f399
Operating System: Raspbian GNU/Linux 9 (stretch)
Kernel: Linux 4.14.98-v7+
Architecture: arm
---- modules
Command 'apt-get install udrc-dkms' failed or was not run.
---- kernel
||/ Name Version Architecture Description
+++-==================-============-============-=================================
ii raspberrypi-kernel 1.20190401-1 armhf Raspberry Pi bootloader
ii udrc-dkms 1.0.5 armhf DKMS source for the UDRC driver
Directory: /proc/device-tree/soc/i2c@7e804000/tlv320aic32x4@18 exists and status is okay
---- syslog
Jun 26 08:04:43 n3ap-p kernel: [ 3.112900] udrc: loading out-of-tree module taints kernel.
Jun 26 08:04:43 n3ap-p kernel: [ 3.116578] snd-udrc soc:sound: ASoC: CODEC DAI tlv320aic32x4-hifi not registered - will retry
Jun 26 08:04:43 n3ap-p kernel: [ 3.116590] snd-udrc soc:sound: snd_soc_register_card() failed: -517
Jun 26 08:04:43 n3ap-p kernel: [ 3.156471] snd-udrc soc:sound: ASoC: CODEC DAI tlv320aic32x4-hifi not registered - will retry
Jun 26 08:04:43 n3ap-p kernel: [ 3.156480] snd-udrc soc:sound: snd_soc_register_card() failed: -517
Jun 26 08:04:43 n3ap-p kernel: [ 3.156693] snd-udrc soc:sound: ASoC: CODEC DAI tlv320aic32x4-hifi not registered - will retry
Jun 26 08:04:43 n3ap-p kernel: [ 3.156699] snd-udrc soc:sound: snd_soc_register_card() failed: -517
Jun 26 08:04:43 n3ap-p kernel: [ 3.164400] snd-udrc soc:sound: ASoC: CODEC DAI tlv320aic32x4-hifi not registered - will retry
Jun 26 08:04:43 n3ap-p kernel: [ 3.164408] snd-udrc soc:sound: snd_soc_register_card() failed: -517
Jun 26 08:04:43 n3ap-p kernel: [ 3.165094] snd-udrc soc:sound: ASoC: CODEC DAI tlv320aic32x4-hifi not registered - will retry
Jun 26 08:04:43 n3ap-p kernel: [ 3.165106] snd-udrc soc:sound: snd_soc_register_card() failed: -517
Jun 26 08:04:43 n3ap-p kernel: [ 3.173895] snd-udrc soc:sound: ASoC: CODEC DAI tlv320aic32x4-hifi not registered - will retry
Jun 26 08:04:43 n3ap-p kernel: [ 3.173901] snd-udrc soc:sound: snd_soc_register_card() failed: -517
Jun 26 08:04:43 n3ap-p kernel: [ 3.261054] snd-udrc soc:sound: ASoC: CODEC DAI tlv320aic32x4-hifi not registered - will retry
Jun 26 08:04:43 n3ap-p kernel: [ 3.261074] snd-udrc soc:sound: snd_soc_register_card() failed: -517
Jun 26 08:04:43 n3ap-p kernel: [ 3.277215] snd-udrc soc:sound: ASoC: CODEC DAI tlv320aic32x4-hifi not registered - will retry
Jun 26 08:04:43 n3ap-p kernel: [ 3.277224] snd-udrc soc:sound: snd_soc_register_card() failed: -517
Jun 26 08:04:43 n3ap-p kernel: [ 3.369568] snd-udrc soc:sound: tlv320aic32x4-hifi <-> 3f203000.i2s mapping ok
---- dmesg
---- compass
Compass preference file not found: /etc/apt/preferences.d/compass
---- compass apt sources list file
deb [arch=armhf,amd64] http://archive.compasslinux.org/ cedar main
---- compass package files
-rw-r--r-- 1 root 2201 Dec 31 10:44 /var/lib/apt/lists/archive.compasslinux.org_dists_cedar_InRelease
-rw-r--r-- 1 root 17567 Jul 2 2018 /var/lib/apt/lists/archive.compasslinux.org_dists_cedar_main_binary-amd64_Packages
-rw-r--r-- 1 root 43316 Dec 31 10:44 /var/lib/apt/lists/archive.compasslinux.org_dists_cedar_main_binary-armhf_Packages
----- Dire Wolf DEVELOPMENT version 1.6 B (Feb 27 2019)
==== Filesystem ====
/dev/root 30G 12G 17G 40% /
==== boot config ====
# Uncomment this to enable the lirc-rpi module
#dtoverlay=lirc-rpi
# Additional overlays and parameters are documented /boot/overlays/README
# Enable audio (loads snd_bcm2835)
#dtparam=audio=on
force_turbo=1
#dtoverlay=
dtoverlay=draws
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
---- gpsd
/usr/local/sbin/gpsd
gpsd: 3.18.1 (revision 3.18.1)
● gpsd.service - GPS (Global Positioning System) Daemon
Loaded: loaded (/lib/systemd/system/gpsd.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2019-06-27 18:58:02 PDT; 2h 52min ago
Process: 470 ExecStart=/usr/local/sbin/gpsd $GPSD_OPTIONS $OPTIONS $DEVICES (code=exited, status=0/SUCCESS)
Main PID: 473 (gpsd)
CGroup: /system.slice/gpsd.service
└─473 /usr/local/sbin/gpsd -n /dev/ttySC0 /dev/pps0
Jun 27 18:58:02 n3ap-p systemd[1]: Starting GPS (Global Positioning System) Daemon...
Jun 27 18:58:02 n3ap-p systemd[1]: Started GPS (Global Positioning System) Daemon.
---- chrony
crw------- 1 root root 243, 0 Jun 27 18:57 /dev/pps0
crw-rw---- 1 root dialout 242, 0 Jun 27 18:58 /dev/ttySC0
crw-rw---- 1 root dialout 242, 1 Jun 27 18:57 /dev/ttySC1
-- chrony sources
210 Number of sources = 6
MS Name/IP address Stratum Poll Reach LastRx Last sample
===============================================================================
#? GPS 0 3 0 - +0ns[ +0ns] +/- 0ns
#? PPS 0 3 0 - +0ns[ +0ns] +/- 0ns
^+ dfw1.ntp5.mattnordhoff.n> 2 10 377 782 -4377us[-4377us] +/- 40ms
^+ 2620:135:5003:ffff::123 2 10 377 61m +1981us[+2706us] +/- 100ms
^+ zinc6.frizzen.net 3 10 377 80m -2897us[-2008us] +/- 104ms
^* t2.time.bf1.yahoo.com 2 10 367 39m +27ms[ +28ms] +/- 83ms
-- chrony tracking
Reference ID : 10453706 (t2.time.bf1.yahoo.com)
Stratum : 3
Ref time (UTC) : Fri Jun 28 04:10:57 2019
System time : 0.000484383 seconds fast of NTP time
Last offset : +0.000541080 seconds
RMS offset : 0.001359585 seconds
Frequency : 4.801 ppm fast
Residual freq : -0.013 ppm
Skew : 0.422 ppm
Root delay : 0.091014 seconds
Root dispersion : 0.018564 seconds
Update interval : 5433.4 seconds
Leap status : Normal
-- chrony sourcestats
210 Number of sources = 6
Name/IP Address NP NR Span Frequency Freq Skew Offset Std Dev
==============================================================================
GPS 0 0 0 +0.000 2000.000 +0ns 4000ms
PPS 0 0 0 +0.000 2000.000 +0ns 4000ms
dfw1.ntp5.mattnordhoff.n> 30 13 152m -0.328 0.349 -5613us 901us
2620:135:5003:ffff::123 28 13 107m +0.301 0.786 -6129us 955us
zinc6.frizzen.net 24 13 88m -0.539 0.662 -5544us 982us
t2.time.bf1.yahoo.com 25 13 129m +1.164 1.844 +14ms 1656us
---- sensors
-rw-r--r-- 1 root root 171 Nov 11 2018 /etc/sensors.d/draws
ads1015-i2c-1-48
Adapter: bcm2835 I2C adapter
User ADC Differential: +0.00 V
+12V: +0.00 V
User ADC 1: +0.00 V
User ADC 2: +0.00 V
---- locale
Locale country codes consistent among WiFi cfg file, iw reg & X11: US
core_config.sh has been run 1 time(s)
